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A GaN-on-Si-based logic, driver and DC-DC converter circuit with closed-loop peak current-mode control

: Basler, Michael; Mönch, Stefan; Reiner, Richard; Waltereit, Patrick; Quay, Rüdiger; Kallfass, Ingmar; Ambacher, Oliver

MESAGO Messe Frankfurt GmbH, Stuttgart:
PCIM Europe 2019, International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management. CD-ROM : Nuremberg, 7-9 May 2019; Proceedings
Berlin: VDE-Verlag, 2019
ISBN: 978-3-8007-4938-6
PCIM Europe <2019, Nuremberg>
Conference Paper
Fraunhofer IAF ()

This work presents an entirely GaN-implemented DC-DC converter circuit with closed-loop peak current-mode control. The circuit combines logic inverter, level-shifter, differential amplifier, comparator, NOR gate, RS flip-flop, power transistor with integrated gate driver, and power diode, all based on a d-mode GaN-on-Si technology. A prototype converter (200-to-100 V, 500 kHz, 100 W, 97% efficiency) was designed and characterized. The GaN-based control circuit requires only 0.5% active chip area compared to the GaN-based driver and power devices. Thus, the work demonstrates that the addition of basic logic circuits in GaN power ICs enables a high gain in functionality at negligible additional area requirement.